Quote Originally Posted by ***Deimos*** View Post
Is HD5870 bandwidth starved..? these games where 4870x2 is faster suggest so:
FO3 82.5 72.3 14%
FC2 75.6 66.5 14%
RE5 124.9 98.9 25%
BAT 131.9 108.2 22%
HAWX 105 74 42%
5870 is double everything, so just as 4870x2, although not handicapped by lower 750Mhz and CF efficiency. Only explanation is x2s 230GB/s vs 153GB/s bandwidth.
No, it's not.

And SLI / CF is like running the framebuffers ( GPU Memory ) in RAID 1 ( Mirroring ), not RAID 0 ( Striping ).
Meaning, the effective bandwidth in dual-GPU cards is the same as a single-GPU card using the same core.

The 4870X2 has 115Gbps not 230Gbps memory bandwidth.